Optional(2018)年...その後

Transcript

1. 0QUJPOBM  ೥
   ͦͷޙ )JEFBLJ
   5BNBJ
   1PUBUPUJQT
   
   
   +VMZ
   
   
   
2. ࣗݾ঺հ )JEFBLJ
   5BNBJ
   ɾ.POFZ
   'PSXBSE
   *OD
   
   
   ɾJ04
   ΞϓϦΤϯδχΞ
   ɾ͘͘͢͢ʂࢠҭͯΤϯδχΞ
   .FFUVQ
   
   
   
   
   UBNBEPO
   
   
   
   
   
   !UBNBEPO
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
3. IUUQTNPOFZGPSXBSEDPNFOHJOFFST@CMPHPQUJPOBM 0QUJPOBM  ೥͚͋·͓ͯ͠ΊͰͱ͏͍͟͝·͢
4. ͜ΕΛػʹXBSOJOHΛ๾໓͢΂͘ ౰ࣾJ04ΤϯδχΞ͕
   ෦ॺΛӽ͑ͯऔΓ૊Έ·ͨ͠ ௨ৗͷػೳ։ൃͱฒߦͯ͠໿ϲ݄
5. Before
6. ΍ͬͨ͜ͱͦͷ̍ 4XJGU-JOU
   
   "VUP
   DPSSFDU
7. Πϯσϯτͷௐ੔͚͔ͩͱࢥͬͯͨΒɺ ؆୯ͳwarning͸मਖ਼ͯ͘͠Εͨ func validate(_ input :(hoge: Fuga)) throws -> Void { func validate(_ input :(hoge: Fuga)) throws {
9. ΍ͬͨ͜ͱͦͷ̎ γϡοͱ௚ͤͦ͏ͳXBSOJOHΛফ͢
10. - public final class Hoge: Fuga { + public class Hoge: Fuga { - network.request(request) { _ in } + _ = network.request(request) { _ in } ྫʣ͜͏͍͏΍ͭ
12. ͋ͱ͸ͪͪ͘͘஍ಓʹ XBSOJOHΛͭͿ͍ͯͬͨ͠
13. ਏ͔ͬͨ΍ͭ
14. Ұ෦ͷϥΠϒϥϦ͕$PDPB1PET ܦ༝͡Όͳ͍ํ๏Ͱಋೖͯ͋͠Δ
    ʢେ൒͸$PDPB1PETܦ༝ʣ wͲͷόʔδϣϯΛ࢖ͬͯΔ͔෼͔Βͳ͍ͷͰ࠷৽ʹΞο ϓσʔτͨ࣌͠ͷӨڹൣғ͕ݟ͑ͣɺΞοϓσʔτ͠ ͯྑ͍ͷ͔ෆ໌
    
    w͔͠΋Ұ෦ಠ࣮ࣗ૷Λ௥Ճͯ͠࢖ͬͯΔ΍ͭ΋͋Δ
15. ಠ࣮ࣗ૷Λ௥Ճͯ͠ͳ͍
    ϥΠϒϥϦ wϥΠϒϥϦͷόʔδϣϯΛίϛοτϩά͔Βਪଌ ͠ӨڹൣғΛௐࠪ
    w$PDPB1PETʹҠߦ
16. ಠ࣮ࣗ૷Λ௥Ճͯ͠Δ
    ϥΠϒϥϦ w൚༻తͳػೳ௥ՃͩͬͨͷͰɺϥΠϒϥϦΛGPSL͠ ͯຊՈʹQVMM
    SFRVFTUΛग़ͨ͠
    wऔΓࠐ·Εͳ͔ͬͨϥΠϒϥϦ͸GPSLFE
    SFQPTJUPSZ ͷϥΠϒϥϦΛ$PDPB1PETͰΠϯετʔϧ
17. After
18. Before
19. After Ϗϧυʹ͔͔Δ͕࣌ؒϝνϟ୹ॖ͞Εͨ
    XBSOJOH࡟আ͚ͩͰͳ͘ɺ4XJGUରԠ΍
    ίϯύΠϧΦϓγϣϯͷมߋ΋ޮՌ͕͋ͬͨͱࢥΘΕΔ
    
20. ࠷ޙͷXBSOJOH ՝ۚͷϨγʔτ͕J04ܗࣜ
    ˠݱࡏରԠத
21. XBSOJOHΛ૿΍͞ͳ͍ औΓ૊Έ
22. Ұྫ ɾϏϧυ࣌ʹ4XJGU-JOU
    "VUP
    DPSSFDU࣮ߦ
    ɾϏϧυʹNTҎ্͔͔͍ͬͯΔॲཧͰXBSOJOH
    ɾ4JEFSʢNJTTQFMMʣಋೖ
    ɾ%BOHFSಋೖ
    
23. ·ͱΊ w ݹ͔͘Βӡ༻͞Ε͍ͯΔϓϩμΫτͰ΋ؤுͬͯऔΓ૊Ί͹ɺ
    XBSOJOHΛ ΄΅̌ʹग़དྷΔ
    w Ϗϧυ୹ॖͷऔΓ૊Έ΋ग़དྷͯϏϧυ͕࣌ؒ෼
    
    ෼·Ͱ୹ॖग़དྷͨ
    w ෦ॺΛ·͍ͨͰXBSOJOH๾໓ʹऔΓ૊ΜͩͷͰɺࣾ಺ͷJ04ΤϯδχΞ಺Ͱ XBSOJOH΍ϦϑΝΫλϦϯάʹର͢Δҙ͕ࣝߴ·ͬͨ
    w XBSOJOHΛݮΒͯ͠ຬ଍͢ΔͷͰ͸ͳ͘ɺ૿΍͞ͳ͍࢓૊Έͷߏங͕େࣄ
24. ͝ਗ਼ௌ͋Γ͕ͱ͏͟͝ ͍·ͨ͠